Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

external/sdl/SDL/test/testdrawchessboard.c

@@ -0,0 +1,157 @@
+/*
+   Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+   This software is provided 'as-is', without any express or implied
+   warranty.  In no event will the authors be held liable for any damages
+   arising from the use of this software.
+
+   Permission is granted to anyone to use this software for any purpose,
+   including commercial applications, and to alter it and redistribute it
+   freely.
+
+   This file is created by : Nitin Jain (nitin.j4\samsung.com)
+*/
+
+/* Sample program:  Draw a Chess Board  by using SDL_CreateSoftwareRenderer API */
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+
+static SDL_Window *window;
+static SDL_Renderer *renderer;
+static SDL_Surface *surface;
+static int done;
+
+
+static void DrawChessBoard(void)
+{
+    int row = 0, column = 0, x = 0;
+    SDL_FRect rect;
+    SDL_Rect darea;
+
+    /* Get the Size of drawing surface */
+    SDL_GetRenderViewport(renderer, &darea);
+
+    for (; row < 8; row++) {
+        column = row % 2;
+        x = column;
+        for (; column < 4 + (row % 2); column++) {
+            SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0xFF);
+
+            rect.w = (float)(darea.w / 8);
+            rect.h = (float)(darea.h / 8);
+            rect.x = (float)(x * rect.w);
+            rect.y = (float)(row * rect.h);
+            x = x + 2;
+            SDL_RenderFillRect(renderer, &rect);
+
+            /* Draw a red diagonal line through the upper left rectangle */
+            if (column == 0 && row == 0) {
+                SDL_SetRenderDrawColor(renderer, 0xFF, 0, 0, 0xFF);
+                SDL_RenderLine(renderer, 0, 0, rect.w, rect.h);
+            }
+        }
+    }
+}
+
+static void loop(void)
+{
+    SDL_Event e;
+    while (SDL_PollEvent(&e)) {
+
+        /* Re-create when window surface has been resized */
+        if (e.type == SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED) {
+
+            SDL_DestroyRenderer(renderer);
+
+            surface = SDL_GetWindowSurface(window);
+            renderer = SDL_CreateSoftwareRenderer(surface);
+            /* Clear the rendering surface with the specified color */
+            SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
+            SDL_RenderClear(renderer);
+        }
+
+        if (e.type == SDL_EVENT_QUIT) {
+            done = 1;
+#ifdef __EMSCRIPTEN__
+            emscripten_cancel_main_loop();
+#endif
+            return;
+        }
+
+        if ((e.type == SDL_EVENT_KEY_DOWN) && (e.key.keysym.sym == SDLK_ESCAPE)) {
+            done = 1;
+#ifdef __EMSCRIPTEN__
+            emscripten_cancel_main_loop();
+#endif
+            return;
+        }
+    }
+
+    DrawChessBoard();
+
+    /* Got everything on rendering surface,
+       now Update the drawing image on window screen */
+    SDL_UpdateWindowSurface(window);
+}
+
+int main(int argc, char *argv[])
+{
+    SDLTest_CommonState *state;
+
+    /* Initialize test framework */
+    state = SDLTest_CommonCreateState(argv, 0);
+    if (state == NULL) {
+        return 1;
+    }
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    /* Parse commandline */
+    if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
+        return 1;
+    }
+
+    /* Initialize SDL */
+    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init fail : %s\n", SDL_GetError());
+        return 1;
+    }
+
+    /* Create window and renderer for given surface */
+    window = SDL_CreateWindow("Chess Board", 640, 480, SDL_WINDOW_RESIZABLE);
+    if (window == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Window creation fail : %s\n", SDL_GetError());
+        return 1;
+    }
+    surface = SDL_GetWindowSurface(window);
+    renderer = SDL_CreateSoftwareRenderer(surface);
+    if (renderer == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Render creation for surface fail : %s\n", SDL_GetError());
+        return 1;
+    }
+
+    /* Clear the rendering surface with the specified color */
+    SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
+    SDL_RenderClear(renderer);
+
+    /* Draw the Image on rendering surface */
+    done = 0;
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(loop, 0, 1);
+#else
+    while (!done) {
+        loop();
+    }
+#endif
+
+    SDL_Quit();
+    SDLTest_CommonDestroyState(state);
+    return 0;
+}